Emperor Go-Sanjō

Emperor Go-Sanjō (後三条天皇, Go-Sanjō-tennō; September 3, 1034 – June 15, 1073) was the 71st emperor of Japan, according to the traditional order of succession. His given name was Takahito (尊仁).

Go-Sanjō's reign spanned the years from 1068 through 1073.

This 11th century sovereign was named after his grandfather Emperor Sanjō and go- (後), translates literally as "later;" and thus, he is sometimes called the "Later Emperor Sanjō", or, in some older sources, may be identified as "Sanjō, the second" or as "Sanjō II."

It was during, and due to, Go-Sanjo's reign that the Fujiwara grip on power was broken; following Go-Sanjo's rule, their power continued to wane until 1150, when any semblance of their power disappeared.

Source: Wikipedia — https://en.wikipedia.org/wiki/Emperor_Go-Sanj%C5%8D